Process of electrically connecting filaments to supply-wires in electric glow-lamps.



no seaeve.

,To alt'whom it may concern:

9; ject of the Emperor of Germany, and a resident of Baden, near Vienna, Empire of Austria-Hungary, have invented certain new f' and useful Improvements in the Processes of Electrically. ConnectingFilaments to Supply-Wires in'Elcctric Glow-Lamps, of which the following is a full, clear, and exact dethe art to make and use the same.-' My invention'rclates to a process of elec 'trically connecting the filaments of electric glow lamps to their supply wires'and has'for .2-between the filaments and the supplywires of electric glow lamps by carbids of metals melting at very high tempera-trues, v c This application is'adivision of. my prior application filed January 19th 1906, Serial metallic character which conductsthe current *betterthan the usual carbon cements and carbon coatings, a metallic material melting j at a higl'i temperature is reruired which adheres equally Well to the car on filament I andto the'metal supply wires. a v j I have found that metal carbids melting at in an excess of metal constitute the desired found that the carbon compounds of the V Qmetails melting at extremely high tempera tures, such as manganese, chromium, molyb- ":denum, tungsten, uranium, vanadium, tan- 2 talum, niobium, titanium,zirconium, nickel,

; cobalt, iron are particularly suitable for the p above purpose. The carbirls of all of these "[40 metals and the solid solutions of such-carf ,j bids inan excess of metal have a certain ailinity for carbon owing to the factthat they contain carbon themselves and very firmly adhere to carbon if applied thereto in a mol- 1 ten state. If for instance. the ends of a car bon filament are dipped into molten carbid of tungsten prepared by the method of ,7 Moissan the pores of the carbon filament ends are soaked or filled with the carbid and @250 after withdrawing the ends of the filament from the molten carbid it will be found that The thickness of this coating may be m'cr eased at will repeatedly dipping the Ans Kcznnor BADEN, NEAR v y f i -P ocnss on ELEG'IJJRIGALLY coNNnc'riNG r'rmnmn'rs T0 sunfLy-wlnns It nLEc'rR rc JG y x LOWJJ sh Specification of Letters Patent. 1;

oiigiiin a lication filed January 19, 1906, Serial no. 29s,ss4. Divided can application med'umh ze, i907 finiamaaes' azi molten carl )id is applied in any suitable scription, such as will enable others skilled in 15 its -object-to establish the electric connection connection is established thereby,'the elegy 7 3 same resu tmay be obtained, if, instead ofa 7; Inorder to obtain a good connection of a high temperatures and their solid solutions- "y'metallic connecting'material. It has been,

7 ,these ends are covered with a metallic coat-' nuNA ,mnsfrnni-niirciiny.

patented Sept, 15, 1908.

- jfilament ends into the molten carbid and Be it known that I, HANS KUZEL, a'sub vinstead of acarbon filament a metal wire is f dipped into the molten cal-bid it becomes also coated with the latter. If therefore the manner t nthcncndi d fig 931391 fllan entgnd its metallic (say nickel) sg mly yvirps'while they are heldin juxtaposition 'or'incontact with each other or temporarily secured to each other by any mechanical means such carbid will solder firmly together the two parts although the consist of heterogeneous materials and as t 1e soldering knot or bead 7 may be made as large as maybe desired a i tric resistance of which is the minimumof what ma r be practically obtained. *The carbon filament a filamentof some other material, such as metal, boron or silicium, or,'if j.

instead of the carbid of tungsten another carblid melting at a very high'temperature is user 7 q. 1 U

' According to this invention I mix one or V I more of the above named metals in a finely powdered state'with carbon, 'or an organic substance giving off carbon on being heated,

with just a suflicient quantity of an agglom- 8 erant, such as gum arabic or sugar solution or the like so as to form a pasty mass. This mass is applied to the parts at thepcint where they are to be connected and then such mass is gradually heated to a white heat,

either in the ordinary way or by means of the electric current or of the voltaic are and if required in the absence of air, either in cacao or in gases or vapors such as illuminating gas, hydrogen, nitrogen, benzine vapors The carbon present or given off combines fwith the metals used whereby carbids of the latter are formed. a x This process is particularly suitable for metals capable offorming carbids very rich in carbon for instance for vanadium. From this a solder very suitable for the process describedis obtained by mixing 90 parts of finely powdered vanadium, 5 parts of finely 1c;

powdered'graphite and 5 parts of gum arabic Y with a little water so as to form a pasty mass i which is used in the manner described.

Instead of organic agglomerants also colloidal metals "or-less advantageously'colliidal oxids may be used as agglomerants.

I wish it to be understood that in the following claim the terms finely powdered metals melting at high temperatures in elude one'or more of such metals and that the term: carbonaceous substances 7 includes free" carbon, such as gra )hite, or substances a )able of giving off car on when heated.

(lo not claim in this application the article oldnanufacture produced by this process, as such product forms the subject of 7 my application Serial No. 296,884. I

' Claim- The process ients to supply wires III electric glow lamps which consists in. mixing finely powdered 6r slat-an connecting fila- Witnesses 5 metals melting and forming carbids at high temperatures with carbonaceous substances, and with an agglomerant whereb a plastic mass is obtained, applying such p astic mass to the points to be connected and gradually heating such massin the absence of air to a white heat whereby carbids of the said metals are formed and fused and finally permitting the same to cool, substantially asand for the P p e described. g

In testimony whereof I hare ig name to this specification, in thepresence of 7 two subscribing witnesses. 7+,- 7,

- rmNs KUZEL:

Gnomes llARDY,'

iA vus'ro b. illoGuE. 

